Surveying
The rise and fall method

is less accurate than height of instrument method
provides a check on the reduction of intermediate point levels
quicker and less tedious for large number of intermediate sights
is not suitable for levelling with tilting levels

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Surveying
Pick up the correct statement for horizontal photographs.

Parallel lines do not appear parallel in central projection
All listed here
The two sides of a road meet at the vanishing point
The lines parallel to the negative plane are projected as parallel lines

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